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首页> 外文会议>International symposium on photoelectronic detection and imaging >Research of Narrow Pulse Width, High Repetition Rate, High Output Power Fiber Lasers for Deep Space Exploration
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Research of Narrow Pulse Width, High Repetition Rate, High Output Power Fiber Lasers for Deep Space Exploration

机译：窄脉冲宽度，高重复频率，高输出功率光纤激光器在深空探测中的研究

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As human beings expand the research in unknown areas constantly, the deep space exploration has become a hot research topic all over the world. According to the long distance and large amount of information transmission characteristics of deep space exploration, the space laser communication is the preferred mode because it has the advantages of concentrated energy, good security, and large information capacity and interference immunity. In a variety of laser source, fibre-optical pulse laser has become an important communication source in deep space laser communication system because of its small size, light weight and large power. For fiber lasers, to solve the contradiction between the high repetition rate and the peak value power is an important scientific problem. General Q technology is difficult to obtain a shorter pulse widths, This paper presents a DFB semiconductor laser integrated with Electro-absorption modulator to realize the narrow pulse width, high repetition rate of the seed source, and then using a two-cascaded high gain fiber amplifier as amplification mean, to realize the fibre-optical pulse laser with pulse width 3ns, pulse frequency 200kHz and peak power 1kW. According to the space laser atmospheric transmission window, the wavelength selects for 1.06um. It is adopted that full fibre technology to make seed source and amplification, pumping source and amplification of free-space coupled into fiber-coupled way. It can overcome that fibre lasers are vulnerable to changes in external conditions such as vibration, temperature drift and other factors affect, improving long-term stability. The fiber lasers can be modulated by PPM mode, to realize high rate modulation, because of its peak power, high transmission rate, narrow pulse width, high frequency stability, all technical indexes meet the requirements of the exploration of deep space communication technology.
机译：随着人类不断扩大对未知领域的研究，深空探索已成为全世界研究的热点。根据深空探测的距离长和信息传输量大的特点，空间激光通信具有能量集中，安全性好，信息容量大和抗干扰性强等优点，是首选方式。在各种激光源中，光纤脉冲激光由于其体积小，重量轻，功率大等特点，已成为深空激光通信系统中的重要通信源。对于光纤激光器，解决高重复频率与峰值功率之间的矛盾是一个重要的科学问题。通用Q技术难以获得较短的脉冲宽度，本文提出了一种集成了电吸收调制器的DFB半导体激光器，以实现窄脉冲宽度，高种子源重复率，然后使用两级高增益光纤放大器作为放大装置，实现了脉冲宽度3ns，脉冲频率200kHz，峰值功率1kW的光纤脉冲激光器。根据空间激光器的大气透射窗口，波长选择为1.06um。采用全光纤技术将种子源与放大，泵浦源与自由空间的放大耦合成光纤耦合方式。它可以克服光纤激光器容易受到外部条件变化（例如振动，温度漂移和其他因素影响）的影响的缺点，从而改善长期稳定性。光纤激光器由于具有峰值功率，高传输速率，窄脉冲宽度，高频率稳定性等优点，因此可以通过PPM模式进行调制，以实现高速率调制，所有技术指标均满足探索深空通信技术的要求。

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